Pumping-engine.



PATENTED SEPT. 12, 1905.

P. F. ODDIE.

PUMPING ENGINE.

APPLIOATION FILED AUG. 16,1904.

4 SHEBTB-8HEET 2.

5 0 9 1 2 l T P E S D E T N E T A P R m HG DN B G m .P M U P APPLICATION TILED AUG. 16, 1904.

4 SHEETS SHEET 3.

PATENTED SEPT. 12, 1905.

P. P. ODDIE.

PUMPING ENGINE.

APPLIGATION IILEDAUG. 16,1904.

4. SHEETS-SHEET 4 T I I I I l I I I I I I I I NITED STATES PATENT OFFICE.

PHILIP FRANCIS ODDIE, OF WIMBLEDON, LONDON, ENGLAND i PUMPING-ENGINE.

Specification of Letters Patent.

Patented Sept. 12, 1905.

. Application'filed August 16, 1904. Serial No. 220,926.

land, residing in Wimbledon, London, England, have invented Improvements in Pump- 1ng-Engmes, of which the following is a specification.

The object of this invention is to improve the construction of a simplex pumping-engine, particularly its valve-gear, so as to make it possible to readily and expeditiously vary and control the time of cut off for either or both ends of the cylinder, to insure a constant stroke of the piston, and to increase the economy of steam consumption.

Broadly, my invention consists of three movable valves, one partaking of the reciprocating motion of the piston, which I will actuating-valve, and athird valve the reversing-valve-actuated by steam -pressure, but such pressure controlled by, first, said actuating-valve through suitable ports, which it covers and uncovers.

In the accompanying drawings, Figure 1 is a side elevation of so much of a pumpingengine as is necessary to illustrate my invention. Fig. 2 is a view similar to Fig. 1, with the valve-box shown in section. Fig. 3 is a View of a detail. of the actuating-valve and its guides, partly in section, to show the ports therein. Fig. 4 is a central sectional side elevation of Fig. 1 with the actuating-valve removed. Fig. 5 is a detailed view of the cutoff valve and the actuating-valve. Fig. 6 is a side elevation of a modified form of actuating-valve. Fig. 7 is adetail, partly in section, of a cut-ofi-regulating means. Fig. 7 is a viewsimilar to Fig. 7 but showing a modified form of regulating means; and Fig. 8 is a view,

similar to Fig. 2, of a tandem compound engine fitted with my improved valve mechanism.

As shown in Figs. 1 to 5, inclusive, A is the steam-cylinder, a the piston on the piston-rod a, while 6 is the exhaust-chamber, provided with an exhaust-port e and in which, between suitable guides e 0 (see Fig. 3,) the actuating slide or valveoZ reciprocates, being connected by a rod (Z and coupling 0Z with the pistonrod a. The sides of the guide-surface e e are perforated by ports 6 6 provided with adjustable throttling-screws b 5, and the opposite sides of the slide at opposite ends are provided with ports (Z d, adapted at the proper time to register with the aforesaid ports 6 6*, as will be hereinafter set forth- A vertical groove cl is formed in oneface of the slide. Within the exhaust-chamber there are provided two additional valve-casings. I have shown them as cylinders at right angles to the travel of the actuating-piston. One of these casings I provide with a hollow cylindrical cut-off valve 0 provided with a centrally-located pin d engaging within the groove d of the actuating-slide cl. A steaminlet Z) is located at one end of one casing,

while communicating ports I) and one. at

each end of the casing, open into opposite ends of the second casing, now to be described, which contains the reversing-valve 0. Near each end of the casing of the reversing-valve there is a port 6 or Z), these ports being continuations of the ports before described as located in the side of the guide-surfaces for the actuating-slide. Inside of these ports Z2 6* ports (0 and a are located, the port a connecting with the port (0 leading into the top of the steam-cylinder and a leading to port a at the bottom of said cylinder. The valve 0 is dumb-bell-shaped, being provided with en-' larged ends 0 0 In operation steam is admitted by passage 6 to both sides of the cut-off valve or slide 0 and supposing the piston to benear the top of its cylinder steam passes through ports 6 b to balance the piston 0 by acting on both its end faces a 0 equally. The steam passes through port 6, enters the ports a a to above the piston, which it forces down with direct steam-pressure until the groove of the actuating-slide moves the pin and cut-01f slide to the right to cut off the port 6. The slide a is not affected by this cut-off until the port 6Z3 of the actuating-slide d coincides with the port 6 on its guide-surface. After the cut-ofi has been accomplished and before the coincidence of theport b with the port al the steam within the cylinder works expansively. When said coincidence takes place, the steam from-the cylinderports a (0 passes out through the port 6 into the exhaust-chamber, reducing the pressure on the right-hand end of the casing of the reversing-valve, which is forced to the right by the pressure acting against its end 0 The speed with which this diminupound engine.

the right. When the reversing-slide has moved to the right, porta is connected with the exhaust-chamber e and port a with the live-steam supply through port 6 and pipe 6, and a similar operation repeated in the reverse direction.

It will be obvious that the extent of cut off will depend upon the shape of the groove (Z of the actuating-slide. This is shown in Fig. 3 as a straight inclined groove of one dimension. In Fig. 6 I have shown the groove d as wider at its center, so as to move without afiecting the cut-off valve for quite a distance, and to then move suddenly to actuate the cut-ofi? valve.

Asimple means of changing the time of cutoff in'a workingpump is illustrated in Figs. 7 and 7*. It will be readily seen that the longer the cut-off cylinder 0 is the quicker will the cut off he, and the shorter the cylinder 0 the longer will be the time of cut off. I have taken advantage of this to secure the regulation, as shown in Fig. 7, in which I have shown a pin or slide d as formed on a right and left handed collar, and asvalve-slide 0 formed of two threaded cylindrical portions threaded into said collar, slidable one upon the other, but turning together. Outside the cylinder I locate a handwheel 0 having a forked inner end adapted to engage a squared projection on the slide, so that the slide may be turned by said handwheel, and as it rotates Within its collar its two halves will be drawn toward or forced away from each other.

The device shown in Fig. 7 differs from that of Fig. 7 mainly in having each end of the cut-off 'separably adjustable. In this figure I have shown the actuating-slide as having a ribor pin d instead of a groove, while a non-rotatable slotted part d having threaded extremities, is engaged by said rib. Thetwo parts of the valve 0 are each internally threaded and each provided with a squared projection at one end engaged by a forked end of a hand-wheel 6Z8. Thus I may secure-a different and separate adjustment of cutiofi for the upstroke as compared with the downstroke of the piston.

In Fig. 8 I have illustrated an arrangement of actuating-slide, cut-0H slide, and reversingslide as constructed for use on a tandem com- In this case the main difierence is in the reversing-slide and easing. This reversing-slide casing is formed on its right with a port a, leading to the upper end of the high-pressure cylinder and a passage (5 to the bottom of the low-pressure cylinder, while its left hand has a port a leading to a at the bottom of the high-pressure cylinder and a port a leading to the top of the low-pressure cylinder. The reversing-slide is formed with a central cylindrical portion joined to the two end portions 0 c by reduced connections h h. In operation the action is similar to that of a the exhaust-chamber, as will be obvious to one skilled inthe art.

I claim as my invention 1. In combination with the cylinder and piston of a pumping-engine, a valve mechanism,

comprising a steam-actuated reversing-slide, a valve-seat therefor at each end, a cut-off slide, asteam-inlet and passages to the valve-seats, a passage from each valve-seat to the piston cylinder, said cut-ofl slide adapted to cut off steam to the ports and passages at one valveseat upon its movement, and an actuating-slide adapted to move said cut-off slide, said actirating-slide being provided with means for opening one end of the piston-cylinder and one of said valve-seats to the exhaust.

2. In combination with the cylinderand piston of apumping-engine, avalve mechanism, comprising a steam-actuated reversing-slide, a valve-seat therefor at each end, a cut-off slide, a steam-inlet and passages to the valve-seats, a passage from each valve-seat to the pistoncylinder, said cut-ofl' slide adapted to out 01f steam to the ports and passages at one valveseat. upon its movement, and an actuatingslide adapted to move said cut-offslide, said actuating-slide being provided with means for opening one end of the piston-cylinder and one of said valve-seats to the exhaust, said reversing and cut-off slides being balanced pistons.

3. In combination with the cylinder and piston of a pumping-engine, a valve mechanism, comprising a steam-actuated reversing-slid e, a valve-seat therefor at each end, a cut-off slide, a steam-inlet and passages to the valve-seats, a passage from each valve-seat to the pistoncylinder, said cut-off slide adapted to cut off steam to the ports and passages at one valveseat upon its movement, and an actuatingslide adapted to move said cut-ofi slide, said actuating-slide being provided with means for opening one end of the piston-cylinder and one of said valve-seats to the exhaust, and a rigid and permanent connection between said actuating-slide and engine piston-rod, so that both move together.

4. A valve mechanism for a steam pumping.- 7

engine, comprising an exhaust-chamber, a steam-actuated reversing-slide, an adjustable cut-off slide and an actuating-slide operating within the exhaust-chamber to operate said cut-off slide, and exhaust-ports controlled by said actuating-slide leading to said reversingslide. I

5. A valve mechanism for asteam pumpingengine, comprising an actuating-slide, a cutoff slide and a steam-operated reversing-slide,

a pin, and an inclined slot therefor between the cut-ofi' slide and the actuating-slide, and

IIS

ports uncovered by said actuating-slide adapted to unbalance and thereby operate said reversing-slide.

6. A valve mechanism for a steam pumpingengine, comprising an actuating-slide, a cutoff slideand a steam-operated reversing-slide, a pin, and an inclined slot therefor between the cut-off slide and the actuating-slide, and ports uncovered by said actuating-slide adapt-- ed to unbalance and thereby operate said reversing-slide, and adjustable throttle means in said ports.

7.- A valve mechanism for asteam pumpingengine, comprising an actuating-slid e,a steamactuated reversing-slide, ports therefor controlled by said actuating-slide, a cut-off slide actuated by first said slide,-said cut-off slide being adjustable in length.

8. A valve mechanism for steam pumpingengines, comprising an actuating slide, a steam-actuated reversing-slide, ports therefor controlled by said actuating-slide, a cut-off slide actuated by first said slide, said cut-off slide being of two parts with both parts movable away from their common center.

9. A valve mechanism for a steam pumpingengine, comprising an actuatingslide,asteam actuated reversing-slide, ports therefor controlled by said actuating-slide, a cut-off slide actuated by first said slide, said cut-off slide being of two parts, with both parts movable away from their common center independently of each other.

10. A valve mechanism for a steam pumping-engine, comprising an exhaust-chamber, an actuating-slide therein, ports in said slide and ports in said exhaust-chamber adapted to be uncovered by said slide, a reversing-valve and easing, a passage from near each end of said casing to said ports in the eXhaust-chamber, a cut-off valve and easing, each end of which communlcates with one end of said reversing-valve casing, connections between the actuating-slide and cut-off slide and a steaminlet to said cut-off-slide casing.

11. A valve mechanism for a steam'pumping-engine, comprising an actuating-slide, a cut-off slide and a steam-operated reversingslide, means carried by'the actuating-slide for positively moving said cut-off slide, and ports uncovered by said actuating-slide adapted to unbalance and thereby operate said reversingslide. V

12. A valve mechanism for a steam pumping-engine, comprising an actuating-slide, a cut-off slide and a steam-operated reversingslide, means carried by the actuating-slide for positively moving said cut-off slide, and ports uncovered by said actuating-slide adapted to unbalance and thereby operate said reversingslide, said cut-off and said reversing slides being balanced pistons.

13. A valve mechanism for a steam pumping-engine, comprising an actuating-slide, a cut-0E slide and asteam-operated reversingslide, means carried by the actuating-slide for positively moving said cut-off slide, and ports uncovered by said actuating-slide adapted to unbalance and thereby operate said reversingslide, said actuating-slide being also adapted to open the engine-cylinder to exhaust.

14. A valve mechanism for a steam pumping-engine, comprising an actuating-slide, an adjustabie cut-off slide and a steam-operated reversing-slide, means carried by the actuating-slide for positively moving said cut-off slide, and ports uncovered by said actuatingslide adapted to unbalance and thereby oper- 

